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donkey's years

noun plural

: a very long time

Full Definition of DONKEY'S YEARS

chiefly British

: a very long time

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First Known Use of DONKEY'S YEARS

1927

Related to DONKEY'S YEARS

Synonyms: aeon (or eon), blue moon, coon's age, cycle, age [chiefly British], eternity, forever, long, months, moon

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